Temperatures in and around St. Louis have been beyond hot this summer. The temperature gauges augur what a world suffering from climate change will look like: Withered fields and plants, dry rivers and dusty roads and cloudless, empty days that lead to fires, such as those raking Oklahoma. In this stifling environment, representatives of the Catholic nuns of America begin meeting tomorrow by a shrinking Mississippi perhaps to fire back at the Vatican. The leaders of the organization that oversees 80 percent of all nuns are under assault from clueless bishops who are attacking the nuns as not being Catholic enough. The bishops have no idea that the public supports the nuns. The idea that the nuns will accept quietly the criticism that the Vatican leveled against them hopefully is not in the cards. From these kinds of critical moments, leaders can emerge.